/Engine/Source/Runtime/Core/Public/Containers/LockFreeList.h
Check if the list is empty.
true if the list is empty. CAUTION: This methods safety depends on external assumptions. For example, if another thread could add to the list at any time, the return value is no better than a best guess. As typically used, the list is not being access concurrently when this is called.
bool IsEmpty() const